It's not an issue with MTBR itself, but the advertisers that run through the site. Megavideo is having the same problem, well them and a load of other sites… not a lot can be done about it! i ran Malwarebytes to get rid of most of it and used Glary utilities to kill the nasty little .exe file that AV Security uses on startup to load itself again.
I've not had an issue since!